PS4 GPU (Graphical Processing Unit)
This is where it gets a bit tricky as I am just going to base my prediction on a product that hasn't been released yet. However I do believe that since the PS4 is a “closed” system and that the cell can do some graphical processing that a relatively moderate GPU can be used in the PS4. For comparison the PS3 uses the Reality Synthesizer developed by Nvidia, clocked at 550MHz with 256Mb of GDDR3 clocked at 700MHz.
This is where it gets a bit tricky as I am just going to base my prediction on a product that hasn't been released yet. However I do believe that since the PS4 is a “closed” system and that the cell can do some graphical processing that a relatively moderate GPU can be used in the PS4. For comparison the PS3 uses the Reality Synthesizer developed by Nvidia, clocked at 550MHz with 256Mb of GDDR3 clocked at 700MHz.
So if Sony is going to continue with stereoscopic 3D then that will rule out any ATI 5000 series cards and below and I do believe that Sony will stick with Nvidia anyway since they have a good relationship. The PS4 will need to be able to support 1080p 3D @ 60 FPS per eye so it has to have enough VRAM.
The Nvidia GeForce GTX 560 (due to be released in 2011) fits the bill perfectly. A 256 bit bus so that it can communicate with the cell fast enough, a 820MHz core clock speed, 1Gb of VRAM clocked @ 1GHz (4GHz effective speed). All of which if utilized properly could do 1080p @ 120 FPS and most importantly unified shader cores means more polygons, higher resolution textures and better effects.
PS4 system RAM.
For comparison the PS3 has 256Mb of XDR RAM clocked at an amazing 3.2GHz (Super fast!!!!!). The next obvious step would to include 1Gb of XDR however XDR2 has been released since that time with many improvements such as a bandwidth increase and reduced latency (even though it was low to begin with). XDR2 operates at double the CPU speed, so 6.4GHz to 7.6GHz is expected even though it can operate at up to 8GHz!
More than 1Gb isn't needed since there is a lot more VRAM this time, therefore there will be a more efficient use of the main RAM this time for other tasks for example watching a video, looking at pictures, going to the playstation store all while in a game.
For comparison the PS3 has 256Mb of XDR RAM clocked at an amazing 3.2GHz (Super fast!!!!!). The next obvious step would to include 1Gb of XDR however XDR2 has been released since that time with many improvements such as a bandwidth increase and reduced latency (even though it was low to begin with). XDR2 operates at double the CPU speed, so 6.4GHz to 7.6GHz is expected even though it can operate at up to 8GHz!
More than 1Gb isn't needed since there is a lot more VRAM this time, therefore there will be a more efficient use of the main RAM this time for other tasks for example watching a video, looking at pictures, going to the playstation store all while in a game.
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